$(document).ready(function()
{
	//hide the all of the element with class msg_body
	$(".unfold_hidden").hide();
	//toggle the componenet with class msg_body
	$(".unfold_link").click(
		function() {
			$(this).parent().nextAll("div.unfold_body:first").slideToggle(740);
			return false;
		}
	);
});